package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.dto.DishDto;
import com.itheima.entity.Dish;
import com.itheima.entity.DishFlavor;
import com.itheima.mapper.DishMapper;
import com.itheima.service.DishFlavorService;
import com.itheima.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.Queue;
import java.util.stream.Collectors;

@Service
public class DishServiceimpl extends ServiceImpl<DishMapper, Dish> implements DishService {
    @Autowired
    private DishFlavorService flavorService;

    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品基本信息到菜品表dish
        this.save(dishDto);
        //菜品id
        Long id = dishDto.getId();
        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(id);
            return item;
        }).collect(Collectors.toList());
        flavorService.saveBatch(flavors);
    }

    @Override
    /*
     * 根据id查询菜品基本信息和对应的口味信息
     * */
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表查询
        Dish byId = this.getById(id);
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(byId, dishDto);
        //查询当前菜品对应的口味信息，从dish——flavor表查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, byId.getId());
        List<DishFlavor> list = flavorService.list(queryWrapper);
        dishDto.setFlavors(list);
        return dishDto;
    }

    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);
        //清理当前菜品对应口味数据---dish——flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());
        flavorService.remove(queryWrapper);
        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item)->{
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());
        flavorService.saveBatch(flavors);
    }
}
